Find the value of each expression mentally.

Jada and Andre find the value of .

Jada’s work

Andre’s work

What do you notice? What do you wonder?

1. Try Andre’s way. Find the value of . Show your thinking, using drawings, numbers, or words.

   Use a number line if it helps.

   

2. Find the value of . Show your thinking, using drawings, numbers, or words.

   Use a number line if it helps.

   

Oh no! Diego spilled paint on his paper. He can’t see all the numbers. 

Find the number that makes each equation true.

5 splatter equations. 250 plus splatter equals 1000. 600 minus 440 equals splatter. 680 plus splatter equals 900. Splatter plus 590 equals 1000. 900 minus 370 equals splatter.

1. __________

2. __________

3. __________

4. __________

5. __________